Made core and library class search optional

Signed-off-by: Darren Hill <dchill42@gmail.com>
Converted Security to Xylophone

Signed-off-by: Darren Hill <dchill42@gmail.com>
Converted Lang to Xylophone

Signed-off-by: Darren Hill <dchill42@gmail.com>
Converted Input to Xylophone

Signed-off-by: Darren Hill <dchill42@gmail.com>
Merge branch 'master' of https://github.com/andrew-s/xylophone